Oar-shaped pen



FIG. 1 is a right front perspective view of an oar-shaped pen showing my new design;

FIG. 2 is a left side view of the oar-shaped pen of FIG. 1, the right side view being a mirror image thereof;

FIG. 3 is a right rear perspective view; and,

FIG. 4 is a front elevational view thereof. 

The ornamental design for an oar-shaped pen, as shown and described. 